Paper ruling machine



April 1-, 1941'.

c E. CLARKE EI'AL PAPER RULING MACHINE Filed July 31, 1939 7 Sheets-Sheet l INVENTOR fl 510 7 f ATT N April 1, 1941. c. E. CLARIKE ETAL I 2 7 PAPER RULING MACHINE 7 Sheets-Sheet 2 Filed July 31, 1939.

Ap 1, 1941? I c. E. CLARKE EIAL 36,724

PAPER RULING MACHINE Filed Jilly 31, 1939 7 Sheets-Sheet 3 @Jiu.

INVENTO Ap x 'il 1, 1941. c. E. CLARK ETAL- PAPER RULING momma Filed July s1, 1939 7 Sheets-Sheet 4 ORNEY C. E. CLARKE EIAL PAPER RULING MACHINE April 1, 1941.

Filed J'lily 31, 1939 Sheets-Sheet 5 a INVEIgOR -M Mil/w k a.

A ORNEY Q'E. CLARKE ETAL PAPER RULING mermm April 1, 1941.

Filed July 31, 1939 7 Sheets-Sheet 6 INVENTOR I M .432 r /{7 April 1, 1941. c. E. CLARKE ETAL PAPER RULING MACHINE Filed July 31, 1939 '7 Sheets-Sheet 7 QQN M, W w

ATTO EY 'Patented Apr. 1, 1941 PAPER. RULING MACHINE Charles E. Clarke, Winchester, and Robert T. Duffy, Boston, Mass., and Joseph W. Cloutier, Franklin, N. H., assignors to Lindbladh Corporation, Boston, Mass, a corporation of Massachusetts Application July 31, 1939, Serial No. 287,552

19 Claims.

This invention relates to paper ruling machines of the general type disclosed in U. S. Letters Patent No. 1,813,940 granted July 14, 1931, on an application of H. E. Lindbladh. More particularly, this invention consists in a combination of improvements in ruling machines, by means of which the rate of production can be materially increased over that obtained from previous machines available to the industry.

Paper ruling machines as usuallyconstructed include in their structure a great number of moving elements such as trains of gears, cams, rollers, and levers, and it has heretofore been impossible to operate available ruling machines at a speed producing more than about four reams of ruled paperan hour,because at higher speed the momentum of the moving elements creates vibration and irregularity of movement interfering with accurate pen control and sheet movement and location. Accordingly, the primary object of our invention is to provide an improved machine which will rule from 6 to reams of paper an hour with perfect accuracy of ruling operation.

We havefound that a ruling machine of the Lindbladh type can be built to operate successfully at a high rate of production if modified in in" cams. Thirdly, a lay boy of novel construction is provided which is arranged to spread the sheets as they are delivered and to stiffen them against buckling by imparting a longitudinal curvature to them. Finally, a Reeves variable speed transmission, directly driving the pen controlling mechanism, providesa smoothly running, eflicient machine and eliminates the necessity for interchanging gears for different machine speeds. The essential idea back of our improvements has been to lighten the movements and reduce the inertia of the moving parts of the machine.

Our invention will best be understood and appreciated from the following description of a preferred embodiment thereof, selected for purposes of illustration and shown in the accompanying drawings in which:

Fig. lis a view in side elevation of that por Fig. 5 is a view in perspective corresponding to Figs. 3 and 4,

Fig. 6 is a view in cross section of a cam wheel and its associated gear,

Fig. 7 is a view in cross section taken through a pen clamp,

-Fig. 8 is a view in perspective of a pen beamand associated elements, I

Fig. 9 is a view in perspective showing the lay y,

Fig. 10 is a view in side elevation of the gearing for the cam wheels, the gear housing being broken away,

Fig. 11 is.a plan view showing the general organization of the machine, and

Fig. 12 is a view in perspective of one corner of the machine.

Before proceeding to describe the details of the machine shown in the drawings we shall present a brief outline of its general construction and organization. The machine is contained within and supported by a long rectangular frame 20 of heavy metal and considerably longer than it is Wide. By means of mechanism not here shown but including a driven feed tape or tapes 214, sheets of paper are taken from'a stack and advanced one by one on the surface of a cloth belt I82 to a gate I02 where each one is momentarily checked and straightened. The sheets are then successively conveyed on the cloth belt or apron I82 running at a carefully predetermined speed beneath a series of endless strings 2I0 which keep the sheets fiat on the cloth I82. Poised over the sheets as they are advanced by the cloth belt I82 are a plurality of pens I94 held in transverse clamps'and these are lowered and raised in accordance with the length of the lines to be ruled on each sheet. Means are provided for raising and lowering certain of the pens I94 held in a clamp without affecting the position of the other pens in the clamp, such means being universally termed an underlift. After the pens have done their work on a sheet, the sheet is passed under a heater to dry the ink, and the sheets are finally removed at the far end of the machine by a lay boy which ensures their delivery into a receiving bin.

Our invention, as previously stated, has for its most important object to increase the production of paper ruling machines, and we have secured the desired result by improving the drive for the cloth belt I82 and for the mechanism for raising and lowering the pens, the pen clamps, and the lay boy. The aforesaid improvements, although directed to different elements of the machine, co-act to make increased production possible.

The improved drive can best be seen in Fig, 2 in which an L-shaped metal base 24 is shown as provided with an integral arm 23 hooked at its outer end to fit over a lower cross girt 22 of the frame, the base 22 being grooved to fit over another cross girt 22. A threaded socket in the base 24 receives a threaded rod 28 which extends out through the frame 28 and is held against longitudinal movement by a pair of collars 82. A hand wheel 38 is provided for turning the rod 28 and sliding the base 28 along the cross girts 22. Bolted to the base 28 is a motor 34 which, through a belt 48, drives a suction blower pump 36 also bolted to the base 26. The motor 34 also drives a variable speed transmission device of the Reeves type, including a pair of disks 52 secured to the motor shaft and having opposed convex faces. The outer disk is keyed to the motor shaft and free to slide longitudinally upon it, being urged toward the other disk by a heavy spring 43. Secured to the outside of the frame 28 are a bracket 44 and a housing 88. A short shaft 46 is journalled in the bracket and in the near wall of the housing 48. A pulley 58 is coupled to the shaft 46 through a conventional clutch 52 and driven from the Reeves transmission by a belt 54. It will be apparent that the speed of the pulley 58 is increased when the base 24 is pulled towards the pulley 58 and vice versa. Fast on the shaft 48 is a pinion 56 which meshes with a gear 58 secured to a shaft 68 journaled in a bearing bracket 62 on the inside of the frame 26 and in the housing 48.

The pump 33 operates a sheet feeding system of the type disclosed in U. S. Letters Patent No. 2,070,860 granted July 1, 1935, on an application of R. T. Duffy and in the co-pen-ding application of Charles E. Clarke Ser. No. 231,495, filed September 24, 1938. The pump 38 is secured to the base 24 and moves with it so that its operation is in no way affected when the base i moved to vary the speed of the belt 54.

Within the housing 48 and secured to the shaft 60 is a gear (not shown) in mesh with another gear 64 secured to a shaft 66 journaled in the housing 48 and in a bearing bracket and gear housing 68. Motion of the shaft 66 is transmitted through bevel gears in the housing 68 to a shaft I8 running transversely across the frame 28 and journaled in a housing I2 on the other side of the frame 28. Within the housing I2 is a gear I4 secured to the shaft I8 and driving two gears 84 and 86 directly and a gear 98 through a smaller intermediate gear 88 in mesh with the gear 83. The gears 84, 86, 88 and 88 turn on studs 16, T3, 88 and 82 respective y, journaled in the housing I2. The studs I6, 18 and 82 extend through the housing and carry cam disks 92, 54, and 9B which control the pen clamps and the underlifts aswill be later explained. It will now be seen that the cam disks controlling the pen clamps are driven through fixed gearing from the Reeves transmission and that the rate of rotation of the cam disks can only be varied by manipulation of the hand wheel 38.

Fast to the shaft 60 and within the housing 48 is a series of gears (not shown) of different diameters. A gear on a pivoted arm may be moved selectively to engage one of the gears on the shaft 68, by means of the handle 228. The movable gear is in mesh with a gear on a shaft 238 to the end of which is secured a bevel gear (not shown) contained within a housing 49 secured to the frame 28. The motion of the shaft 238 is transmitted through bevel gears in the housing ll) to a series of gears in a casing 230 secured to the inside of the frame 20. The last gear in the train of gears in the casing 238 is secured to a shaft which carries a transverse roll 282 of large diameter around which is passed a wide cloth belt or apron I82. The belt I82 moves along the surface of a convex bed I88 secured within the frame 28 and preferably made of wood or other light material. At its further or delivery end the belt I82 passes over a roll 242. The shaft for the roll 232 is geared to a shaft 288 disposed above it and transversely of the frame 28. A heavy roll 23I is carried on the shaft 288 and cooperates with the roll 232 to feed the sheets onto the moving cloth belt I82. The belt I82 and the rolls may be turned by means of a hand wheel 234 secured to the end of the shaft 288 in setting up or adjusting the machine.

Supported on the frame 28 is a pair of standards 208 which in turn support transverse rollers 289. In the base of the standard 208 at the delivery end of the machine is a roll 2 and supported adjacent the base of the standard 288 at the near end of the machine is a plurality of grooved guide rollers 218 carried on a shaft 216. A number of endless strings or thread are carried by the standards and rollers and the strings pass over the roll 232, passing under the guides 0218, and the motion of the roll 232 causes the strings to move at the same rate as the cloth belt I82. Thus it will be seen that sheets of paper are taken from a stack (by means of mechanism not shown) and disposed upon moving LTtELpBS 274 which bring the sheets to the bite of the rolls 232 and 234 so that the strings 2H] and the belt I82 cooperate to advance the sheets over the bed I88. The strings 2H1 also act to keep the sheets fiat on the cloth belt I82 during the {Z0 ruling operation. Transverse tension bars 236 are carried in the frame 28 and eccentrically mounted. The bars 236 may be adjusted to impart any degree of desired tension to the cloth belt I82 and to raise or lower it with respect to the strings 2 Ill.

The drive for the machine, as above described, begins with the motor 34 which drives the cam disks directly from the Reeves transmission, and a branch drive works through the change speed system in the casing 2I8 to the cloth rolls and the string rolls. The feeding mechanism (not shown) is also operated through the change speed system from the shafts 240 and MI. It will be apparent that the speed of the cam disks controls the strik- (35 ing of the pens, the most important movement in the machine. The change speed system in the casing 48 determines the rate of what might be termed the auxiliary motions of the machine, namely the feeding and conveying mechanism.

By means of our drive the speed of the cam disks is controlled through the Reeves transmission, and any necessary compensating in the auxiliary motions can be made through the change speed system in the branch drive. A register roll 2I2 is carried in the frame 28 over the strings 2H! and is eccentrically mounted. The roll 2I2 may be adjusted to change the tension of the threads 2I0 on the cloth I82. adjustedby means of a thumb screw 238 connected to the shaft for the roll and working in the base of the standard 208.

A toothed gate I02 is pivotally mounted and extends across the frame 20 over the strings and the cloth, and a lever I80 connected to the gate I02 is reciprocated by a cam 98 fast on the end of the shaft 10. By means of the cam 98 and the lever I the gate I02 is caused intermittently to swing into contact with the cloth belt I82, its function being momentarily to check the oncoming sheets of paper and align them exactly before they reach the pens.

'The pump 38 operates a vacuum feed system including a flexible conduit 226 provided at one end with a bleeder valve in a housing 224 secured to the casing 48. The valve in the housing 224 is operated by a plunger 220 controlled by a cam 2I8 secured to a shaft 2I6 disposed transversely of the machine and operated by a handle 2I4. When the machine is shut down after a run, the handle 2I4 is moved to open the valve and relieve the vacuum. A shaft 240, which is coupled to the shaft 66, operates the timing valve (not shown) for the vacuum feed device above referred to, and the shaft 24I coupled to the shaft 280 operates the sheet conveying tapes 214.

By reference to Figs. 5 and 6, it will be seen that the cam disk 92 is provided with concentric grooves I08 cut into its inner and outer side faces and accessible through a slot H0 in the periphery of the cam disk 92. The grooves are adapted to receive two or more cams or dogs of two different types. One is a pickup cam II2 which has a base that may be bolted in fixed position in one of the grooves I08 and a raised and pointed striking section or ear closely hugging the face of the cam disk. The other is a drop cam II4 which vis similar to the pickup cam,

except that its pointed ear is offset from the face of the cam disk 92. Secured to the upper members of the frame 20 are oppositely disposed carriages H6 and I22 having bearings II8 for a rod I20 disposed transversely above the cloth belt I82. At one end of the rod I20 is secured a bracket I24 which has journals for two other transverse shafts I26 and I28 and corresponds in this respect to a bearing bracket I25 secured near the opposite end of the rod I28. Torsion springs I98 and 200 force the shafts I28 and I26 to turn in a clockwise direction. The bracket I24, however, has-a long extension ending in a short bar I32 and a fork acting as a pivot mount for a key I34. Pivotally mounted on the outer end of the bar I32 is a latch I36 having a shoulder near its free end, and a similar latch I38 is pivotally secured to the inner end of the bar I32. Helical springs I40 on the bar I32 urge the latches I36 and I38 to swing in clockwise direction. The bracket II6 has an integral extension I42 directly beneath the end of the extension of the bracket I24 and a stop bolt I44 bears thereon and provides means for adjusting the height of the assembly on the bracket I24 The roll 2II may also be which is provided with opposed feet I46 extending outer end of the link I48 and is provided with a downwardly extending pointed ear I5I and a lug I52 set in its outer face. A stop bolt I54 in the end of the link I48 permits adjustment of the height thereof from the extension I42. A lever I58 is fast at one end to the shaft I28 between the arms of the yoke I49 and carries a stop'bolt I60 bearing on a lug I56 set in the link I48; a lever I62 permits locking the stop bolt I in desired vertical position. The foregoing elements are arranged so that the ear of a pickup cam II2 will strike the ear I5I and lift it, thus lifting the link I48; the latch I36 is forced in clockwise direction by the spring I40 until the lug I52 is caught on the shoulder of the latch, thus holding the link in elevated position. When the link I48 is lifted, the lug I56 forces the bolt I60 and its associated lever I58 upwardly, thus turning the shaft I28 in counterclockwise direction and lifting the pen clamp into inoperative position. When a drop cam II4 strikes the latch I36 the lug I52 is released, and the link I48 and the shaft I28 resume their former posi- .tions and the pens are returned to their operative positions or strike. The duration of the periods during which the link I08 is held in raised or lowered position is primarily determined by the setting of the Reeves transmission, which con- I trols the rate of rotation of the cam disks, and secondarily determined by the position of the pick-up cams and drop cams in the groove I08 of the cam disks. The number of cams which may be used is not limited and the link I48 can be raised and lowered several times during onearevolution of the cam disk 92 if that is desire The action of the cams on the inside of the cam disk 92 is identical with the movements just described. A link I64 is provided with a yoke I free on the shaft I26 and has a block at its outer end similar to the block I50 andprovided with a lug I68. A stop bolt I10 is carried by the end of the link I64 which cooperates through a lug I12 with a stop bolt I16 carried by a lever I14 which is secured to the shaft I 26 between the arms of the yoke I85. The stop bolt I16 is tightened by means of a handle I18.

A handle I15 is carried on the outer end of the bar I32 and by this the whole assembly above the cam disk 92 may be raised by the operator and temporarily rendered inoperative.

and the key I34 falls naturallyinto a position where it bears on the extension I42. Thus by raising the handle I15, the key I34 falls into place and when the handle I15 is lowered again, the key I34 bears on theextension I42 and renders the cams and latches inoperative. A reinforcing bearing bracket I30 clamps the three shafts I28, I26, and I28 firmly together and prevents relative lateral movement thereof.

The shaft I28 may be termed the pen clamp shaft, since it is secured by a bracket I96, to a pen clamp which may be of the construction illustrated in Fig. '1. The pen clamp, in its preferred form, consists in a long light wooden upv per bar I84 curved at its forward edge to supplement a similar curve in the forward edge of a light underlying wooden member I86. Opening into the under face of the upper member I84 are a number of sockets I88 for bolts I90 screwed up through and fast in the lower member I86, and each socket has a hole in its rear side for a long thumb screw I92 having a tapered end. Each bolt I90 has a taper hole fitting the point of a thumb screw I92. Thus, when the thumb The feet I46 carry the links I48 and I64 upwardly and remove I the lugs I52 and I68 from the path of the cams,

screws I92 are turned in, the points enter the taper holes in the bolts I90 and each bolt acts to draw together the sections of the upper and lower member adjacent to it. A series of flexible pens I94 may be arranged in desired locations along the pin clamp and between the members thereof, the thumb screws being individually operable to release any selected pen or pens.

At this point it should be noted that we have omitted the conventional metal pen beam and secured the light pen clamp directly to the shaft I28. This results in lightening the work of the cams, eliminating vibrations in the machine which would otherwise oscillate or disturb the pens, and permits the machine to be run at relatively high speeds without impairing the accuracy of the striking of the pens I94.

The shaft I26 is flattened on one side and to it underlifts are secured. Each,underlift comprises an elongated spatulate finger 262 hooked at its inner end to fit over the shaft I26 and provided with a pair of adjusting bolts 204 and 266 bearing on the flattened face of the shaft I26 and by means of which the underlift may be clamped at any desired angle. Underlifts may be placed on the shaft I26 in any desired combination. For example, there may be five pens in the pen clamp and underlifts disposed under two of them. When the cam disk 92 rotates, the outside cams raise and lower the pen clamp with all five pens at predetermined intervals, whereas the inside cams affect only the two pens provided with underlifts. r

The lay boy at the discharge end of the machine will now be described with particular reference to Figs. 9 and 11. This mechanism is designed to impart to the sheet being delivered a longitudinally curved configuration. thereby stiffening the sheet and insuring delivery without danger of buckling. The mechanism now to be described is designed to impart a compound longitudinal curvature to the sheet by lifting its marginal edges and its central portion and depressing or holding down the sheet along lines spaced within its marginal edges. The sheet has thus imparted to it a central convex curvature merging into two parallel concave curvatures.

Referring to Figs. 9 and 11, it will be seen that a pair of longitudinally adjustable carriages 248 are mounted opposite to each other upon the side frames 20. In these carriages are journalled the transverse cloth rolls 242 and 244, the ruled sheets passing over the roll 242 in leaving the machine. The carriages are each provided with an upright standard or bracket 25!] and between these brackets extends a stationary supporting rod 252. Mounted to rock freely upon the supporting rod 252 is a pair of heads 262 each provided with an upstanding spindle 264. An angular arm 254 provided with a hub 266 is rigidly but adjustably secured to each spindle 264. Each arm 254 extends horizontally and then downwardly at an inclination, being provided at its lower end with bearings for a crowned guide roll 256. The heads 262 may be adjusted transverseiy upon the supporting rod 252 in accordance with the width of the sheet to be handled and all positions of adjustment are so located that the guide wheels 256 run upon the sheets carried by the cloth I82 as they pass over the cloth roll 242. The arms 254 are set so that the guide rolls 256 rotate in slightly divergent planes thus tending to spread the sheet under light tension between them.

Each arm 254 carries a curved downwardly extending bracket 258 provided at its lower end with an outwardly inclined elongated guide plate or scoop 260 which is disposed with its inner edge practically in contact with the surface of the apron I82. It will be understood that each arm 254 with its associated guide roll and scoop rest by their own weight upon the apron I82 or upon the sheet carried by the same.

A transverse supporting rod 263 extends between the side frames 20 just beyond and below the cloth roll 242. Adjustably secured to the rod 268 is a center guide bar or finger 210 which extends rearwardly close to the surface of the apron I32 and midway between the two scoops 200. The guide bar 2'10 tapers inwardly, its in ner or advanced edge being beveled to pass under the advancing edge of the sheets and to deflect each sheet progressively more and more into upwardly convex curvature as the sheet advances to the point of delivery. The inner ends of the scoops 260 are also beveled to a point and thus are arranged to pick up the margins of the advancing sheets and lift them above the surface of the apron, while in adjacent lines the guide rolls 256 hold the body of the sheet down upon the surface of the apron $82. It will thus be seen that the scoops 260, the guide bar 210, and the guide rolls 256 cooperate to impart a compound curvature to the sheet, the crest of the central curve being above the guide bar 210 and the valleys of the concave curves being beneath the guide rolls 256. The sheet is thus stiffened longitudinally and in that condition is passed accurately out of the machine.

From the foregoing description of one embodiment of our invention it will be apparent that we have provided a smooth and eflicient drive for the mechanisms of the machine, lightened the pen clamp, introduced a lighter and more efficient cam-operated pen controlling mechanism, and improved the lay-boy to ensure rapid and accurate delivery of the ruled sheets. Incidentally the underlifts have been improved and more accurate adjustment thereof made possible. A

machine of the type illustrated in the drawings has been successfully operated at the hitherto unheard of rate of 5,000 sheets. or 10 reams, per hour. Although a single machine has been shown in the drawings, the invention has been successfully applied to a duplex machine in which the pens of either member of the machine may be operated for feint lining or for striking.

Having thus described our invention we claim as new and desire to secure by Letters Patent of the United States- 1. Pen clamp operating mechanism for paper ruling machines, which comprises a pen clamp, a shaft fast to said pen clamp, an arm secured to said shaft, a pointed ear secured to said arm, a cam disk, a pointed cam secured to said cam disk and arranged to strike said ear to lift said arm and turn said shaft to lift the pen clamp, means independent of the cam and cam disk for holding the pen clamp in raised position, and a second cam on the cam disk and having a pointed offset portion arranged to release the holding means and permit the pen clamp to drop.

2. An underlift for ruling machines, comprising an elongated spatulate finger provided with a hook at its base, and a pair of adjusting bolts threaded in the hook.

3. An underlift for ruling machines comprising a flattened shaft, an elongated finger provided with a hook, and a pair of adjusting bolts threaded through the hook, whereby the hook may be any desired angle on the shaft by manipulation of the adjusting bolts.

4. In a paper ruling machine including sheet feeding and conveying mechanisms, the combination of a frame, a rod disposed transversely across the frame, a bearing bracket fast on each end of said rod, a rock shaft journaled in said bearing bracket, a pen clamp secured to said rock shaft and movable therewith, a cam wheel mounted on the frame and provided with a marginal slot, a first cam secured in said groove and having a pointed ear set close to the surface of the cam wheel, a second cam secured in said groove and having a pointed ear offset from the surface of the cam wheel, a link mounted at one end on said rock shaft and having at its free end a pointed cam follower overhanging the path of the ear of the first cam, an extension integral with said bearing bracket and overhanging the cam Wheel, a spring loaded latch pivotally mounted on said extension and disposed in the path of the ear of the second cam, and a lug on the cam follower disposed to be engaged by said latch, whereby during rotation of the cam wheel the first cam raises the cam follower to cause the latch to engage the lug and also to rock the pen clamp, and the second cam disengages the latch without touching the cam follower.

5. In a paper ruling machine including sheet conveying mechanism and a pen clamp; the combination of a shaft fast to said pen clamp, a link secured to said shaft, a spring loaded latch disposed adjacent the free end of said link, a lug secured to the free end of said link, a cam disk disposed below the free end of said link, a block fast to said link and having a downwardly extending pointed ear, a series of pointed cams disposed on the cam disk some of which are arranged to strike the pointed ear of said block to lift the link and pen clamp and other cams being arranged to strike the latch without touching the pointed ear.

6. In a paper ruling machine including a pen clamp, the combination of a shaft fast to said pen clamp, an arm secured to said shaft, a cam disk disposed beneath the outer end of said arm, a downwardly extending pointed ear fast to the outer end of said arm, a pointed cam secured to said cam disk and arranged to strike said ear as the disk is rotated, a lug disposed on said arm and extending beyond the ear, 2. second pointed cam offset from the surface of the disk and secured to said disk, and a spring loaded latch disposed in the path of said second cam adjacent the outer end of said arm and movable to engage the lug and hold the arm and pen clamp elevated until the second cam disengages the latch from the lug.

7. A paper ruling machine, which comprises a frame, a pen clamp disposed transversely across the frame, a shaft fast to said pen clamp and journaled at the sides of the frame, an arm secured to the shaft and having its outer end extending beyond the frame, a cam disk rotatably mounted outside of the frame and underlying the end of the arm, a downwardly extending pointed ear secured to the end of said arm, a pointed cam secured on the cam disk and striking in its path the pointed ear, a lug secured to the ear, a second pointed cam recessed to avoid striking the ear, a latch disposed adjacent the outer end of the arm and arranged to engage the lug on the ear, the latch lying in the path of the second pointed cam.

8. A paper ruling machine, which comprises a frame, a pen clamp disposed transversely across the frame, a shaft fast to said pen clamp and journaled at, the sides of the frame, a spring connected to said shaft and resisting rotating thereof, an arm secured to the shaft and having its outer end extending beyond the frame, a cam disk rotatably mounted outside of the frame and underlying the end of the arm, a downwardly extending pointed ear secured to the end of said arm, a pointed cam secured on the cam disk and striking in its path the pointed ear, a lug secured to the ear, a second pointed cam recessed to avoid striking the ear, a latch disposed adjacent the outer end of the arm and arranged to engage the lug on the ear, the latch lying in the path of the second pointed cam.

9. In a paper ruling machine the combination of a frame, a bearing bracket mounted on the frame, a shaft rotatably journaled in the bracket,

an armsecured to said shaft at the side of the frame, a second shaft journaled in said arm, a pen clamp fast to said second shaft, a third shaft j also journaled in said arm, underlif-ts secured to saidthird shaft, a second arm fast to said second 'shaft and parallel to the first arm, a third arm fast to said third shaft and parallel to the first arm on the opposite side from the second arm, a cam disk underlying the ends of said three arms and rotatably mounted outside said frame, downwardly extending ears carried on the ends of said second and third arms, lugs on said ears, spring loaded latches pivotally mounted on the end of the first arm and arranged to engage the lugs on the ears, a cam on each side of the cam disk arranged to strike said ears, and other cams on each cam disk arranged to avoid the ears and strike the latches.

10. The structure recited in claim 9 and in addition thereto, means for holding said ears out of engagement with the cams.

11. In a paper ruling machine including a pen clamp, and a pen clamp shaft; the combination of an arm secured at one end to said shaft, a cam disk rotatably mounted below the end of the shaft, a pointed block depending from said arm, a lug on the outside face of the block, a cam adjustably secured on the outer surface of the cam disk and having a pointed portion hugging the face of the disk and arranged to strike the pointed block to lift the arm and the pen clamp, a latch pivotally mounted near the block and arranged to engage the lug when the cam has raised the block, and a second cam adjustably secured on the cam disk and having an offset portion arranged to avoid the block but strike the latch and release the arm to lower the pen clamp.

12. In a paper ruling machine, a pen clamp, an arm for raising or lowering said pen clamp, a pointed block disposed on the free end of the arm, a cam disk disposed for rotation below the block, a lug fast on the block, a latch arranged to engage the lug and hold the arm elevated, a cam secured to the cam disk and dimensioned to lift the block and arm just high enough for the latch to engage the lug, and a second cam secured to the disk and arranged to strike only the latch-to disengage it from the lug.

13. In a paper ruling machine the combination of a pen clamp, a shaft fast to the pen clamp, a long yoke freely mounted on the shaft and having a lug integral therewith, a short arm fast to the shaft between the arms of the yoke, a bolt threaded through the arm and bearing on said lug, and arms disposed adjacent the free end of the yoke for raising and lowering it, the bolt serving to turn the shaft relative to the yoke.

14. In a ruling machine, a pen clamp, an arm for lifting the pen clamp, a cam disk adjacent to the end of the arm and located in front of said pen clamp, a latch disposed to engage the arm when the pen clamp is lifted, and a pair of cams secured to said cam disk and arranged to rotate in parallel, non-coincident paths for actuating the arm and latch respectively to raise and lower the pen clamp.

15. In a ruling machine, a frame, a shaft disposed across the frame, a bracket secured at one side of the frame and providing a journal for the shaft, an arm fast to the shaft and disposed substantially parallel to the frame, a latch movable upon the bracket for engaging the arm, and rotatable means secured to the frame successively for lifting the arm and rocking the shaft and for disengaging the latch from the arm.

16. In a ruling machine, a pen clamp, a bracket in which said pen clamp is pivotally mounted, an arm adjacent said bracket controlling the elevation of the pen clamp, rotatable means for raising the arm, a latch secured to the bracket and movable to engage the lifted arm, and means for disengaging the latch to allow the arm to drop.

17. In a ruling machine, a frame, a pen clamp pivotally mounted across said frame, a pair of brackets pivotally mounted at the sides of the frame to carry the pen clamp, an extension integral with one of said brackets, an arm disposed in juxtaposition to the extension and controlling the elevation of the pen clamp, a latch movable on said extension, adjustable means for lifting said arm and causing the latch to engage the arm and hold it elevated, and adjustable latch disengaging means for dropping said arm.

18. In a ruling machine, a frame, a bracket secured to one side of said frame, a shaft journalled in said bracket, a pen clamp fast to said shaft and disposed over said frame, an arm fast to said shaft at the side of the frame, a latch secured to the bracket and movable to engage the arm, and cams movable in parallel non-coincident paths for first lifting the arm to cause the latch to engage the arm and then disengaging the latch to drop the arm.

19. In a ruling machine, a frame, a pair of brackets pivotally mounted at opposite sides of the frame, an underlift shaft and a pen clamp shaft rotatably supported by said brackets, an arm secured to the underlift shaft, an arm secured to said pen clamp shaft in parallel relation with the first arm, a disk underlying the extremities of said arms and secured to the frame in advance of said brackets, means secured to said disk for controlling the elevation of the first arm and independent means also secured to the disk for controlling the elevation of the second arm, and means for holding the arms out of reach of the elevation controlling means when the brackets are pivoted upwardly to a predetermined position.

CHARLES E. CLARKE. JOSEPH W. CLOUTIER. ROBERT T. DUFFY. 

